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QJEEM22Ph2779: JEE Main 2022 Physics - Class 12 JEEM22Ph2779 Solution: The I-V characteristics of a p-n junction diode in forward bias …

The I-V characteristics of a p-n junction diode in forward bias is shown in the figure. The ratio of dynamic resistance, corresponding to forward bias voltage of 2 V and 4 V respectively, is :

JEE Main 2022 (Online) 26th June Morning Shift Physics - Semiconductor Question 75 English

Multiple Choice Options

  • A 1:02
  • B 5:01
  • C 1:40
  • D 20:01

Step-by-Step Verified Solution

∴\therefore R=ΔvΔiR = {{\Delta v} \over {\Delta i}}

Now, dynamic resistance at V=2VV = 2V is

R2=0.15×10−3 Ω{R_2} = {{0.1} \over {5 \times {{10}^{ - 3}}}}\,\Omega

= 20 Ω\Omega

Similarly,

R4=0.250×10−3=4 Ω{R_4} = {{0.2} \over {50 \times {{10}^{ - 3}}}} = 4\,\Omega

R2R4=51{{{R_2}} \over {{R_4}}} = {5 \over 1}

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